import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;


/**
 * Created with IntelliJ IDEA.
 * Description:
 * JDBC查询
 * User: xwl
 * Date: 2023-06-12
 * Time: 16:01
 */
public class JDBCSelect {
    public static void main(String[] args) throws SQLException {
        // 1.创建数据源并初始化数据源
        DataSource dataSource = new MysqlDataSource();
        ((MysqlDataSource)dataSource).setUrl("jdbc:mysql://127.0.0.1:3306/xwl?characterEncoding=utf8&useSSL=false");
        ((MysqlDataSource)dataSource).setUser("root");
        ((MysqlDataSource)dataSource).setPassword("123456");
        // 2.建立连接
        Connection connection = dataSource.getConnection();
        // 3.构造SQL
        String sql = "select * from student";
        PreparedStatement statement = connection.prepareStatement(sql);
        // 4.执行SQL
        ResultSet resultSet = statement.executeQuery();
        // 5.遍历结果集合
        while (resultSet.next()) {
            //
            int id = resultSet.getInt("id");
            String name = resultSet.getString("name");
            System.out.println("id = " + id + ", name = " + name);
        }
        // 6.释放资源
        resultSet.close();
        statement.close();
        connection.close();
    }
}
